Shozo asakawa



S. ASAKAWA.

SHIP CONSTRUCTION.

APPLICATION man APR. 16. 1918.

Patented Aug. 19, 1919.

SHOZO ASAKAWA, 0F KAIVAGAWA-KEN, JAPAN.

SHIP CONSTRUCTION.

Specification of Letters Patent. Pa,tented Aug. 19, 1919.

Application filed April 16; 1918. Serial No. 228,861.

To all whom it may concern:

Be it known that I, S1-Iozo ASAKAWA, a subject of the Emperor of Japan, and residing at No. 105 Suzaki, Uraga, Kanagawa- Ken, Japan, have invented certain new and useful Improvements in Ship Construction, of which the following is a specification.

This invention relates to ships and is particularly directed to improvements in the hulls thereof. The improvements are especially provided in order to eliminate certain material and the expense incident to the assemblage thereof. By my construction I am enabled to obtain greater storage space for the cargo, and increased stability without affecting the strength or rigidity of the hull.

One of the objects of my invention is to improve the hulls of vessels having cellular double bottoms, and this I accomplish by substituting vertical bars for the horizon- .tal longitudinal frames now used. Generally, therefore, my invention consists in combining a double bottomed hull having longitudinal beams, with vertical side bars which extend upwardly from the bottom of the hull and form the skeleton frame for the sides of the ship.

WVith the foregoing object outlined and with other objects in view, which will appear as the description proceeds, my invention consists in the novel features hereinafter described in detail, illustrated in the accompanying drawings and more particularly pointed out in the appended claims.

Referring to the drawings:

Figure 1, is a transverse vertical sectional view of a portion of the bottom and side of a ships hull constructed in accordance with my invention.

Fig. 2, is a transverse horizontal sectional view of the same.

In detail:

In Figs. 1 and 2 of the drawings B, represents the bottom of a vessel constructed in accordance with my invention and including vertically disposed longitudinal keel bars 8, 9 and 10 which preferably extend the full length of the .vessel. These bars are spaced apart the necessary distance and are connected together by series of vertical transverse plates, 6, the connection of the plates and bars being made by means of angle irons 13, which are vertically disposed. The plates 6 are also connected together by means of longitudinally disposed angle irons 11 and 12 and are provided with apertures 14 to reduce their weight. Extending from the plate 10 are vertical transverse gusset plates 4, which correspond in number to the rows of plates 6 and connected at their lower ends to the plates 4, are vertically extending angle irons 2, which are secured to reversely placed angle irons 1, to form the side ribs of the hull. Resting on the upper edges of the plates 6 and upper surfaces of the bars 11 is the floor plating 7. The outer plating 3 of the hull is connected to the lower bars 12 and to the angle irons 1. A longitudinally extending ngle bar 5 is used in connecting the bar 10 to the outer plating of the vessel.

With the old well known construction employing only longitudinal frames it will be seen that a multiplicity of longitudinal plates and bars are used in forming the sides of the ship and that these members extending inwardly occupy a large portion of the interior of the hull and consequently the cargo space is reduced thereby. The plates 4 also form shelves upon which damp material may collect and this accumulated material will cause the plates to rot and thus affect the rigidity of the hull. By my con struction I am enabled to increase the cargo space, eliminate a great deal of material, and reduce the cost of construction.

In Figs. 1 and 2 I have shown the upper deck 15 and lower deck 16 but as the decks form no part of my invention it will not be necessary to describe the same.

What I claim and desire to secure by Letters Patent is:

1. In a ship, the combination with a double bottom having longitudinal bars extending substantially the entire length of the vessel and transverse intercostal short bars connecting the same, of longitudinal shell and inner bottom plating connected to said bars, and a side framing formed only of vertically extending bars having their lower ends connected to said double bottom in the way of the intercostal bars.

2. In a ship, the combination with a double bottom having longitudinal bars extending substantially the entire length of the vessel and transverse intercostal short bars arranged between the longitudinal bars, of

longitudinal shell and inner bottom plating In testimony whereof I have hereunto set connected to said bars, and a side framing my hand in presence of two subscribing witformed only of vertical angle bars which nesses.

correspond in number to the transverse bars SHOZO ASAKAWA. 5 and have their lower ends secured to said Witnesses:

double bottom in the way of the intercostal GEUJI K'USIBARA,

bars. JORGE B. DELGADO.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

